[WD] MySql Query returns different result (1 reply)

Hello to all

I have a strange situation during different execution of a query:

The query is:

sSql="SELECT mag.codice, mag.descrizione, MONTH(mov.data_mov) AS mese, SUM(mov.qta) AS qtaAcq "
sSql+=" FROM movimenti as mov INNER JOIN  magazzino AS mag ON mov.codice_articolo=mag.codice "
sSql+=" WHERE mov.causale BETWEEN 200 AND 202 "
sSql+=" AND mov.anno_mov="+nAnno
sSql+=" AND mag.fornitore_abituale="+nFornitore 
sSql+=" GROUP BY mag.codice, MONTH(mov.data_mov)"




bRes=HExecuteSQLQuery(dsMyQueryAcq,MyConnection1,hQueryWithoutCorrection,sSql)


IF  bRes=False THEN
	Info ("Errore durante l'elaborazione sul database"+CR+CR+HErrorInfo())
	RETURN
ELSE
	bDati=HReadFirst (dsMyQueryAcq)
	IF  bDati THEN
		WHILE NOT HOut ()
			IF  dsMyQueryAcq.codice <> "" THEN
//				if  dsMyQueryAcq.codice="919947" THEN
//					info ("stop!")
//				END
				IF  sUltCodice <> dsMyQueryAcq.codice THEN
					IF  nRiga > 0 THEN
						FOR j=1 TO 12
							nTotale+={"Table_acquisti.col_mese"+j}[nRiga]
						END
						TABLE_Acquisti.COL_Totali[nRiga]=nTotale
					END
					TableAdd (TABLE_Acquisti,dsMyQueryAcq.codice+TAB+dsMyQueryAcq.descrizione)
					nTrovati+=1
					nRiga=TABLE_Acquisti..Occurrence
					sUltCodice=dsMyQueryAcq.codice
					nTotale=0
					nMese=dsMyQueryAcq.mese
					{"table_acquisti.col_mese"+nMese}[nRiga]=dsMyQueryAcq.qtaAcq
				ELSE
					nMese=dsMyQueryAcq.mese
					{"table_acquisti.col_mese"+nMese}[nRiga]=dsMyQueryAcq.qtaAcq
				END
			END
			HReadNext ()
		END
	END
END

What i'm trying to obtain is a list of products and for each month with a value, it
add the quantity bought/sold in a cell.

When the query is executed the 1st time, the result is correct.
Using the same parameters and trying to execute the query a second time, the result is
totally different and without errors or other issues.
Pratically in the table are shown only the code and product name, despite using the debug i see the correct value in the variable, but it is not shown on the table...Why??

Do i missing something??

Thanks in advance
Gianni


This is the table used:
[attachment 2283 scheda.png]